OM-360 207 220A

October 2002

Processes

Description

TIG (GTAW) Welding

Stick (SMAW) Welding

Arc Welding Power Source

Syncrowave 180 SD�

Visit our website at

www.MillerWelds.com

Miller Electric manufactures a full lineof welders and welding related equipment.For information on other quality Millerproducts, contact your local Miller distributor to receive the latest fullline catalog orindividual catalog sheets. To locate your nearestdistributor or service agency call 1-800-4-A-Miller, or visit us atwww.MillerWelds.com on the web.

Thank you and congratulations on choosing Miller. Now you can getthe job done and get it done right. We know you don’t have time to doit any other way.

That’s why when Niels Miller first started building arc welders in 1929,he made sure his products offered long-lasting value and superiorquality. Like you, his customers couldn’t afford anything less. Millerproducts had to be more than the best they could be. They had to be thebest you could buy.

Today, the people that build and sell Miller products continue thetradition. They’re just as committed to providing equipment and servicethat meets the high standards of quality and value established in 1929.

This Owner’s Manual is designed to help you get the most out of yourMiller products. Please take time to read the Safety precautions. Theywill help you protect yourself against potential hazards on the worksite.

We’ve made installation and operation quickand easy. With Miller you can count on yearsof reliable service with proper maintenance.And if for some reason the unit needs repair,there’s a Troubleshooting section that willhelp you figure out what the problem is. Theparts list will then help you to decide theexact part you may need to fix the problem.Warranty and service information for yourparticular model are also provided.

Miller is the first weldingequipment manufacturer inthe U.S.A. to be registered tothe ISO 9001:2000 QualitySystem Standard.

Working as hard as you do– every power source fromMiller is backed by the mosthassle-free warranty in thebusiness.

From Miller to You

Miller offers a TechnicalManual which providesmore detailed service andparts information for yourunit. To obtain a TechnicalManual, contact your localdistributor. Your distributorcan also supply you withWelding Process Manualssuch as SMAW, GTAW,GMAW, and GMAW-P.

TABLE OF CONTENTS

SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1. Symbol Usage 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2. Arc Welding Hazards 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3. Additional Symbols for Installation, Operation, and Maintenance 3. . . . . . . . . . . . . . . . . . . . . . . 1-4. Principal Safety Standards 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5. EMF Information 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 1 – CONSIGNES DE SECURITE – LIRE AVANT UTILISATION 5. . . . . . . . . . . . . . . . . . . . . 1-1. Signification des symboles 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2. Dangers relatifs au soudage à l’arc 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3. Dangers supplémentaires en relation avec l’installation, le fonctionnement

et la maintenance 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4. Principales normes de sécurité 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5. Information sur les champs électromagnétiques 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 2 – INSTALLATION 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1. Included with Your Unit 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2. Selecting A Location 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3. Dimensions And Weights 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4. Specifications 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5. Duty Cycle Chart 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6. Volt-Ampere Curves 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7. Weld Output Terminals And Selecting Cable Sizes 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8. Remote 14 Receptacle 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9. Shielding Gas Connections 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10. Typical TIG Connections 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11. Typical Stick Connections 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12. Electrical Service Guide 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13. Connecting Input Power 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 3 – OPERATION 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1. Controls 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2. Example of Front Panel Amperage Control For Stick (SMAW) Welding 17. . . . . . . . . . . . . . . . . 3-3. Example of Remote Amperage Control For TIG (GTAW) Welding 17. . . . . . . . . . . . . . . . . . . . . 3-4. Postflow Control 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5. Selecting TIG Starting Characteristics 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6. Timer/Cycle Counter 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7. Balance/DIG Control 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 4 – MAINTENANCE AND TROUBLESHOOTING 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1. Routine Maintenance 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2. Adjusting Spark Gaps 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3. Voltmeter/Ammeter Help Displays 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4. Troubleshooting 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 5 – ELECTRICAL DIAGRAM 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SECTION 6 – HIGH FREQUENCY (HF) 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-1. Welding Processes Requiring High Frequency 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2. Sources Of HF Radiation From Incorrect Installation 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3. Correct Installation 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 7 – SELECTING & PREPARING TUNGSTEN ELECTRODE FOR DC OR AC WELDING 287-1. Selecting Tungsten Electrode (Wear Clean gloves To Prevent Contamination Of Tungsten) 287-2. Preparing Tungsten Electrode For Welding 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 8 – GUIDELINES FOR TIG WELDING (GTAW) 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1. Positioning The Torch 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2. Torch Movement During Welding 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3. Positioning Torch Tungsten For Various Weld Joints 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 9 – STICK WELDING (SMAW) GUIDELINES 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SECTION 10 – PARTS LIST 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OPTIONS AND ACCESSORIESWARRANTY

WARNINGThis product, when usedfor welding or cutting,produces fumes orgases which containchemicals known to theState of California tocause birth defects and,in some cases, cancer.(California Health &Safety Code Section25249.5 et seq.)

OM-360 Page 1

SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USINGsom _nd_4/98

1-1. Symbol Usage

Means Warning! Watch Out! There are possible hazardswith this procedure! The possible hazards are shown inthe adjoining symbols.

� Marks a special safety message.

� Means “Note”; not safety related.

This group of symbols means Warning! Watch Out! possibleELECTRIC SHOCK, MOVING PARTS, and HOT PARTS hazards.Consult symbols and related instructions below for necessary actionsto avoid the hazards.

1-2. Arc Welding Hazards

� The symbols shown below are used throughout this manual tocall attention to and identify possible hazards. When you seethe symbol, watch out, and follow the related instructions toavoid the hazard. The safety information given below is onlya summary of the more complete safety information found inthe Safety Standards listed in Section 1-4. Read and follow allSafety Standards.

� Only qualified persons should install, operate, maintain, andrepair this unit.

� During operation, keep everybody, especially children, away.

ELECTRIC SHOCK can kill.

Touching live electrical parts can cause fatal shocksor severe burns. The electrode and work circuit iselectrically live whenever the output is on. The inputpower circuit and machine internal circuits are also

live when power is on. In semiautomatic or automatic wire welding, thewire, wire reel, drive roll housing, and all metal parts touching thewelding wire are electrically live. Incorrectly installed or improperlygrounded equipment is a hazard.

� Do not touch live electrical parts.

� Wear dry, hole-free insulating gloves and body protection.

� Insulate yourself from work and ground using dry insulating matsor covers big enough to prevent any physical contact with the workor ground.

� Do not use AC output in damp areas, if movement is confined, or ifthere is a danger of falling.

� Use AC output ONLY if required for the welding process.

� If AC output is required, use remote output control if present onunit.

� Disconnect input power or stop engine before installing orservicing this equipment. Lockout/tagout input power according toOSHA 29 CFR 1910.147 (see Safety Standards).

� Properly install and ground this equipment according to itsOwner’s Manual and national, state, and local codes.

� Always verify the supply ground – check and be sure that inputpower cord ground wire is properly connected to ground terminal indisconnect box or that cord plug is connected to a properlygrounded receptacle outlet.

� When making input connections, attach proper grounding conduc-tor first – double-check connections.

� Frequently inspect input power cord for damage or bare wiring –replace cord immediately if damaged – bare wiring can kill.

� Turn off all equipment when not in use.

� Do not use worn, damaged, undersized, or poorly spliced cables.

� Do not drape cables over your body.

� If earth grounding of the workpiece is required, ground it directlywith a separate cable.

� Do not touch electrode if you are in contact with the work, ground,or another electrode from a different machine.

� Use only well-maintained equipment. Repair or replace damagedparts at once. Maintain unit according to manual.

� Wear a safety harness if working above floor level.

� Keep all panels and covers securely in place.

� Clamp work cable with good metal-to-metal contact to workpieceor worktable as near the weld as practical.

� Insulate work clamp when not connected to workpiece to preventcontact with any metal object.

� Do not connect more than one electrode or work cable to anysingle weld output terminal.

SIGNIFICANT DC VOLTAGE exists after removal ofinput power on inverters.� Turn Off inverter, disconnect input power, and discharge input

capacitors according to instructions in Maintenance Sectionbefore touching any parts.

Welding produces fumes and gases. Breathingthese fumes and gases can be hazardous to yourhealth.

FUMES AND GASES can be hazardous.

� Keep your head out of the fumes. Do not breathe the fumes.

� If inside, ventilate the area and/or use exhaust at the arc to removewelding fumes and gases.

� If ventilation is poor, use an approved air-supplied respirator.

� Read the Material Safety Data Sheets (MSDSs) and themanufacturer’s instructions for metals, consumables, coatings,cleaners, and degreasers.

� Work in a confined space only if it is well ventilated, or whilewearing an air-supplied respirator. Always have a trained watch-person nearby. Welding fumes and gases can displace air andlower the oxygen level causing injury or death. Be sure the breath-ing air is safe.

� Do not weld in locations near degreasing, cleaning, or spraying op-erations. The heat and rays of the arc can react with vapors to formhighly toxic and irritating gases.

� Do not weld on coated metals, such as galvanized, lead, orcadmium plated steel, unless the coating is removed from the weldarea, the area is well ventilated, and if necessary, while wearing anair-supplied respirator. The coatings and any metals containingthese elements can give off toxic fumes if welded.

OM-360 Page 2

Arc rays from the welding process produce intensevisible and invisible (ultraviolet and infrared) raysthat can burn eyes and skin. Sparks fly off from theweld.

ARC RAYS can burn eyes and skin.

� Wear a welding helmet fitted with a proper shade of filter to protectyour face and eyes when welding or watching (see ANSI Z49.1and Z87.1 listed in Safety Standards).

� Wear approved safety glasses with side shields under yourhelmet.

� Use protective screens or barriers to protect others from flash andglare; warn others not to watch the arc.

� Wear protective clothing made from durable, flame-resistant mate-rial (leather and wool) and foot protection.

Welding on closed containers, such as tanks,drums, or pipes, can cause them to blow up. Sparkscan fly off from the welding arc. The flying sparks, hotworkpiece, and hot equipment can cause fires and

burns. Accidental contact of electrode to metal objects can causesparks, explosion, overheating, or fire. Check and be sure the area issafe before doing any welding.

WELDING can cause fire or explosion.

� Protect yourself and others from flying sparks and hot metal.

� Do not weld where flying sparks can strike flammable material.

� Remove all flammables within 35 ft (10.7 m) of the welding arc. Ifthis is not possible, tightly cover them with approved covers.

� Be alert that welding sparks and hot materials from welding caneasily go through small cracks and openings to adjacent areas.

� Watch for fire, and keep a fire extinguisher nearby.

� Be aware that welding on a ceiling, floor, bulkhead, or partition cancause fire on the hidden side.

� Do not weld on closed containers such as tanks, drums, or pipes,unless they are properly prepared according to AWS F4.1 (seeSafety Standards).

� Connect work cable to the work as close to the welding area aspractical to prevent welding current from traveling long, possiblyunknown paths and causing electric shock and fire hazards.

� Do not use welder to thaw frozen pipes.

� Remove stick electrode from holder or cut off welding wire atcontact tip when not in use.

� Wear oil-free protective garments such as leather gloves, heavyshirt, cuffless trousers, high shoes, and a cap.

� Remove any combustibles, such as a butane lighter or matches,from your person before doing any welding.

FLYING METAL can injure eyes.

� Welding, chipping, wire brushing, and grindingcause sparks and flying metal. As welds cool,they can throw off slag.

� Wear approved safety glasses with sideshields even under your welding helmet.

BUILDUP OF GAS can injure or kill.

� Shut off shielding gas supply when not in use.� Always ventilate confined spaces or use

approved air-supplied respirator.

HOT PARTS can cause severe burns.

� Do not touch hot parts bare handed.� Allow cooling period before working on gun or

torch.

MAGNETIC FIELDS can affect pacemakers.

� Pacemaker wearers keep away.� Wearers should consult their doctor before

going near arc welding, gouging, or spotwelding operations.

NOISE can damage hearing.

Noise from some processes or equipment candamage hearing.

� Wear approved ear protection if noise level ishigh.

Shielding gas cylinders contain gas under highpressure. If damaged, a cylinder can explode. Sincegas cylinders are normally part of the weldingprocess, be sure to treat them carefully.

CYLINDERS can explode if damaged.

� Protect compressed gas cylinders from excessive heat, mechani-cal shocks, slag, open flames, sparks, and arcs.

� Install cylinders in an upright position by securing to a stationarysupport or cylinder rack to prevent falling or tipping.

� Keep cylinders away from any welding or other electrical circuits.

� Never drape a welding torch over a gas cylinder.

� Never allow a welding electrode to touch any cylinder.

� Never weld on a pressurized cylinder – explosion will result.

� Use only correct shielding gas cylinders, regulators, hoses, and fit-tings designed for the specific application; maintain them andassociated parts in good condition.

� Turn face away from valve outlet when opening cylinder valve.

� Keep protective cap in place over valve except when cylinder is inuse or connected for use.

� Read and follow instructions on compressed gas cylinders,associated equipment, and CGA publication P-1 listed in SafetyStandards.

OM-360 Page 3

1-3. Additional Symbols For Installation, Operation, And Maintenance

FIRE OR EXPLOSION hazard.

� Do not install or place unit on, over, or nearcombustible surfaces.

� Do not install unit near flammables.

� Do not overload building wiring – be sure power supply system isproperly sized, rated, and protected to handle this unit.

FALLING UNIT can cause injury.

� Use lifting eye to lift unit only, NOT runninggear, gas cylinders, or any other accessories.

� Use equipment of adequate capacity to lift andsupport unit.

� If using lift forks to move unit, be sure forks arelong enough to extend beyond opposite side ofunit.

OVERUSE can cause OVERHEATING

� Allow cooling period; follow rated duty cycle.� Reduce current or reduce duty cycle before

starting to weld again.� Do not block or filter airflow to unit.

STATIC (ESD) can damage PC boards.

� Put on grounded wrist strap BEFORE handlingboards or parts.

� Use proper static-proof bags and boxes tostore, move, or ship PC boards.

MOVING PARTS can cause injury.

� Keep away from moving parts.� Keep away from pinch points such as drive

rolls.

WELDING WIRE can cause injury.

� Do not press gun trigger until instructed to doso.

� Do not point gun toward any part of the body,other people, or any metal when threadingwelding wire.

MOVING PARTS can cause injury.

� Keep away from moving parts such as fans.� Keep all doors, panels, covers, and guards

closed and securely in place.

H.F. RADIATION can cause interference.

� High-frequency (H.F.) can interfere with radionavigation, safety services, computers, andcommunications equipment.

� Have only qualified persons familiar withelectronic equipment perform this installation.

� The user is responsible for having a qualified electrician prompt-ly correct any interference problem resulting from the installa-tion.

� If notified by the FCC about interference, stop using theequipment at once.

� Have the installation regularly checked and maintained.

� Keep high-frequency source doors and panels tightly shut, keepspark gaps at correct setting, and use grounding and shielding tominimize the possibility of interference.

ARC WELDING can cause interference.

� Electromagnetic energy can interfere withsensitive electronic equipment such ascomputers and computer-driven equipmentsuch as robots.

� Be sure all equipment in the welding area iselectromagnetically compatible.

� To reduce possible interference, keep weld cables as short aspossible, close together, and down low, such as on the floor.

� Locate welding operation 100 meters from any sensitive elec-tronic equipment.

� Be sure this welding machine is installed and groundedaccording to this manual.

� If interference still occurs, the user must take extra measuressuch as moving the welding machine, using shielded cables,using line filters, or shielding the work area.

1-4. Principal Safety Standards

Safety in Welding and Cutting, ANSI Standard Z49.1, from AmericanWelding Society, 550 N.W. LeJeune Rd, Miami FL 33126Safety and Health Standards, OSHA 29 CFR 1910, from Superinten-dent of Documents, U.S. Government Printing Office, Washington, D.C.20402.Recommended Safe Practices for the Preparation for Welding and Cut-ting of Containers That Have Held Hazardous Substances, AmericanWelding Society Standard AWS F4.1, from American Welding Society,550 N.W. LeJeune Rd, Miami, FL 33126National Electrical Code, NFPA Standard 70, from National Fire Protec-tion Association, Batterymarch Park, Quincy, MA 02269.

Safe Handling of Compressed Gases in Cylinders, CGA Pamphlet P-1,from Compressed Gas Association, 1235 Jefferson Davis Highway,Suite 501, Arlington, VA 22202.Code for Safety in Welding and Cutting, CSA Standard W117.2, fromCanadian Standards Association, Standards Sales, 178 RexdaleBoulevard, Rexdale, Ontario, Canada M9W 1R3.Safe Practices For Occupation And Educational Eye And FaceProtection, ANSI Standard Z87.1, from American National StandardsInstitute, 1430 Broadway, New York, NY 10018.Cutting And Welding Processes, NFPA Standard 51B, from NationalFire Protection Association, Batterymarch Park, Quincy, MA 02269.

OM-360 Page 4

1-5. EMF Information

Considerations About Welding And The Effects Of Low FrequencyElectric And Magnetic FieldsWelding current, as it flows through welding cables, will cause electro-magnetic fields. There has been and still is some concern about suchfields. However, after examining more than 500 studies spanning 17years of research, a special blue ribbon committee of the NationalResearch Council concluded that: “The body of evidence, in thecommittee’s judgment, has not demonstrated that exposure to power-frequency electric and magnetic fields is a human-health hazard.”However, studies are still going forth and evidence continues to beexamined. Until the final conclusions of the research are reached, youmay wish to minimize your exposure to electromagnetic fields whenwelding or cutting.To reduce magnetic fields in the workplace, use the followingprocedures:

1. Keep cables close together by twisting or taping them.

2. Arrange cables to one side and away from the operator.

3. Do not coil or drape cables around your body.

4. Keep welding power source and cables as far away from opera-tor as practical.

5. Connect work clamp to workpiece as close to the weld as possi-ble.

About Pacemakers:Pacemaker wearers consult your doctor first. If cleared by your doctor,then following the above procedures is recommended.

OM-360 Page 5

SECTION 1 – CONSIGNES DE SECURITE – LIRE AVANTUTILISATION

som _nd_fre 4/98

1-1. Signification des symboles

Signifie Mise en garde ! Soyez vigilant ! Cette procédureprésente des risques de danger ! Ceux-ci sont identifiéspar des symboles adjacents aux directives.

� Identifie un message de sécurité particulier.

� Signifie NOTA ; n’est pas relatif à la sécurité.

Ce groupe de symboles signifie Mise en garde ! Soyez vigilant ! Il y a desrisques de danger reliés aux CHOCS ÉLECTRIQUES, aux PIÈCES ENMOUVEMENT et aux PIÈCES CHAUDES. Reportez-vous aux symboleset aux directives ci-dessous afin de connaître les mesures à prendre pouréviter tout danger.

1-2. Dangers relatifs au soudage à l’arc

� Les symboles présentés ci-après sont utilisés tout au long duprésent manuel pour attirer votre attention et identifier les risquesde danger. Lorsque vous voyez un symbole, soyez vigilant etsuivez les directives mentionnées afin d’éviter tout danger. Lesconsignes de sécurité présentées ci-après ne font que résumerl’information contenue dans les normes de sécurité énuméréesà la section 1-4. Veuillez lire et respecter toutes ces normes desécurité.

� L’installation, l’utilisation, l’entretien et les réparations ne doi-vent être confiés qu’à des personnes qualifiées.

� Au cours de l’utilisation, tenir toute personne à l’écart et plus par-ticulièrement les enfants.

UN CHOC ÉLECTRIQUE peut tuer.

Un simple contact avec des pièces électriques peutprovoquer une électrocution ou des blessures graves.L’électrode et le circuit de soudage sont sous tensiondès que l’appareil est sur ON. Le circuit d’entrée et lescircuits internes de l’appareil sont également sous

tension à ce moment-là. En soudage semi-automatique ou automatique,le fil, le dévidoir, le logement des galets d’entraînement et les piècesmétalliques en contact avec le fil de soudage sont sous tension. Desmatériels mal installés ou mal mis à la terre présentent un danger.

� Ne jamais toucher les pièces électriques sous tension.� Porter des gants et des vêtements de protection secs ne comportant

pas de trous.� S’isoler de la pièce et de la terre au moyen de tapis ou d’autres

moyens isolants suffisamment grands pour empêcher le contact phy-sique éventuel avec la pièce ou la terre.

� Ne pas se servir de source électrique àcourant électrique dans les zoneshumides, dans les endroits confinés ou là où on risque de tomber.

� Se servir d’une source électrique àcourant électrique UNIQUEMENT si leprocédé de soudage le demande.

� Si l’utilisation d’une source électrique àcourant électrique s’avère néces-saire, se servir de la fonction de télécommande si l’appareil en est équipé.

� Couper l’alimentation ou arrêter le moteur avant de procéder à l’instal-lation, à la réparation ou à l’entretien de l’appareil. Déverrouillerl’alimentation selon la norme OSHA 29 CFR 1910.147 (voir normes desécurité).

� Installer et mettre à la terre correctement cet appareil conformément àson manuel d’utilisation et aux codes nationaux, provinciaux etmunicipaux.

� Toujours vérifier la terre du cordon d’alimentation – Vérifier et s’assu-rer que le fil de terre du cordon d’alimentation est bien raccordé à laborne de terre du sectionneur ou que la fiche du cordon est raccordéeà une prise correctement mise à la terre.

� En effectuant les raccordements d’entrée fixer d’abord le conducteurde mise à la terre approprié et contre-vérifier les connexions.

� Vérifier fréquemment le cordon d’alimentation pour voir s’il n’est pasendommagé ou dénudé – remplacer le cordon immédiatement s’il estendommagé – un câble dénudé peut provoquer une électrocution.

� Mettre l’appareil hors tension quand on ne l’utilise pas.� Ne pas utiliser des câbles usés, endommagés, de grosseur insuffi-

sante ou mal épissés.� Ne pas enrouler les câbles autour du corps.� Si la pièce soudée doit être mise à la terre, le faire directement avec un

câble distinct.� Ne pas toucher l’électrode quand on est en contact avec la pièce, la

terre ou une électrode provenant d’une autre machine.

� N’utiliser qu’un matériel en bon état. Réparer ou remplacer sur-le-champ les pièces endommagées. Entretenir l’appareil conformémentà ce manuel.

� Porter un harnais de sécurité quand on travaille en hauteur.

� Maintenir solidement en place tous les panneaux et capots.

� Fixer le câble de retour de façon à obtenir un bon contact métal-métalavec la pièce à souder ou la table de travail, le plus près possible de lasoudure.

� Isoler la pince de masse quand pas mis à la pièce pour éviter le contactavec tout objet métallique.

Il y a DU COURANT CONTINU IMPORTANT dans lesconvertisseurs après la suppression de l’alimenta-tion électrique.� Arrêter les convertisseurs, débrancher le courant électrique, et dé-

charger les condensateurs d’alimentation selon les instructionsindiquées dans la partie entretien avant de toucher les pièces.

Le soudage génère des fumées et des gaz. Leurinhalation peut être dangereux pour votre santé.

� Eloigner votre tête des fumées. Ne pas respirerles fumées.

� A l’intérieur, ventiler la zone et/ou utiliser un échappement au niveaude l’arc pour l’évacuation des fumées et des gaz de soudage.

� Si la ventilation est insuffisante, utiliser un respirateur à alimenta-tion d’air homologué.

� Lire les spécifications de sécurité des matériaux (MSDSs) et lesinstructions du fabricant concernant les métaux, les consomma-bles, les revêtements, les nettoyants et les dégraisseurs.

� Travailler dans un espace fermé seulement s’il est bien ventilé ou enportant un respirateur à alimentation d’air. Demander toujours à unsurveillant dûment formé de se tenir à proximité. Des fumées et desgaz de soudage peuvent déplacer l’air et abaisser le niveau d’oxy-gène provoquant des blessures ou des accidents mortels. S’assu-rer que l’air de respiration ne présente aucun danger.

� Ne pas souder dans des endroits situés à proximité d’opérations dedégraissage, de nettoyage ou de pulvérisation. La chaleur et lesrayons de l’arc peuvent réagir en présence de vapeurs et former desgaz hautement toxiques et irritants.

� Ne pas souder des métaux munis d’un revêtement, tels que l’aciergalvanisé, plaqué en plomb ou au cadmium à moins que le revête-ment n’ait été enlevé dans la zone de soudure, que l’endroit soit bienventilé, et si nécessaire, en portant un respirateur à alimentationd’air. Les revêtements et tous les métaux renfermant ces élémentspeuvent dégager des fumées toxiques en cas de soudage.

LES FUMÉES ET LES GAZ peuventêtre dangereux.

OM-360 Page 6

Le rayonnement de l’arc du procédé de soudagegénère des rayons visibles et invisibles intenses(ultraviolets et infrarouges) susceptibles de provoquer

des brûlures dans les yeux et sur la peau. Des étincelles sont projetéespendant le soudage.

LES RAYONS DE L’ARC peuvent pro-voquer des brûlures dans les yeux etsur la peau.

� Porter un casque de soudage muni d’un écran de filtre approprié pourprotéger votre visage et vos yeux pendant le soudage ou pour regar-der (voir ANSI Z49.1 et Z87.1 énuméré dans les normes de sécurité).

� Porter des protections approuvés pour les oreilles si le niveau sondre esttrop élevé.

� Utiliser des écrans ou des barrières pour protéger des tiers de l’éclairet de l’éblouissement; demander aux autres personnes de ne pas re-garder l’arc.

� Porter des vêtements de protection constitué dans une matière dura-ble, résistant au feu (cuir ou laine) et une protection des pieds.

Le soudage effectué sur des conteneurs fermés telsque des réservoirs, tambours ou des conduites peutprovoquer leur éclatement. Des étincelles peuvent êtreprojetées de l’arc de soudure. La projection d’étincel-

les, des pièces chaudes et des équipements chauds peut provoquer desincendies et des brûlures. Le contact accidentel de l’électrode avec desobjets métalliques peut provoquer des étincelles, une explosion, unsurchauffement ou un incendie. Avant de commencer le soudage, vérifieret s’assurer que l’endroit ne présente pas de danger.

LE SOUDAGE peut provoquer unincendie ou une explosion.

� Se protéger et d’autres personnes de la projection d’étincelles et demétal chaud.

� Ne pas souder dans un endroit là où des étincelles peuvent tomber surdes substances inflammables.

� Déplacer toutes les substances inflammables à une distance de 10,7m de l’arc de soudage. En cas d’impossibilité les recouvrir soigneuse-ment avec des protections homologués.

� Des étincelles et des matériaux chauds du soudage peuvent facile-ment passer dans d’autres zones en traversant de petites fissures etdes ouvertures.

� Surveiller tout déclenchement d’incendie et tenir un extincteur à proxi-mité.

� Le soudage effectué sur un plafond, plancher, paroi ou séparationpeut déclencher un incendie de l’autre côté.

� Ne pas effectuer le soudage sur des conteneurs fermés tels que desréservoirs, tambours, ou conduites, à moins qu’ils n’aient été prépa-rés correctement conformément à AWS F4.1 (voir les normes desécurité).

� Brancher le câble sur la pièce le plus près possible de la zone de sou-dage pour éviter le transport du courant sur une longue distance pardes chemins inconnus éventuels en provoquant des risques d’élec-trocution et d’incendie.

� Ne pas utiliser le poste de soudage pour dégeler des conduites ge-lées.

� En cas de non utilisation, enlever la baguette d’électrode du porte-électrode ou couper le fil à la pointe de contact.

� Porter des vêtements de protection dépourvus d’huile tels que desgants en cuir, une chemise en matériau lourd, des pantalons sans re-vers, des chaussures hautes et un couvre chef.

� Avant de souder, retirer toute substance combustible de vos pochestelles qu’un allumeur au butane ou des allumettes.

DES PARTICULES VOLANTESpeuvent blesser les yeux.

� Le soudage, l’écaillement, le passage de la pièceà la brosse en fil de fer, et le meulage génèrentdes étincelles et des particules métalliques vo-

lantes. Pendant la période de refroidissement des soudures, elles ris-quent de projeter du laitier.� Porter des lunettes de sécurité avec écrans latéraux ou un écran facial.

LES ACCUMULATIONS DE GAZ ris-quent de provoquer des blessures oumême la mort.

� Fermer l’alimentation du gaz protecteur en cas denon utilisation.

� Veiller toujours à bien aérer les espaces confinés ou se servir d’un respi-rateur d’adduction d’air homologué.

DES PIÈCES CHAUDES peuvent pro-voquer des brûlures graves.

� Ne pas toucher des parties chaudes à mains nues� Prévoir une période de refroidissement avant

d’utiliser le pistolet ou la torche.

LES CHAMPS MAGNÉTIQUES peuventaffecter les stimulateurs cardiaques.

� Porteurs de stimulateur cardiaque, restez à distance.� Les porteurs d’un stimulateur cardiaque doivent

d’abord consulter leur médecin avant de s’approcherdes opérations de soudage à l’arc, de gougeage oude soudage par points.

LE BRUIT peut affecter l’ouïe.

Le bruit des processus et des équipements peut affecterl’ouïe.

� Porter des protections approuvés pour les oreilles sile niveau sondre est trop élevé.

Des bouteilles de gaz protecteur contiennent du gazsous haute pression. Si une bouteille est endomma-gée, elle peut exploser. Du fait que les bouteilles de gazfont normalement partie du procédé de soudage, les

manipuler avec précaution.

� Protéger les bouteilles de gaz comprimé d’une chaleur excessive,des chocs mécaniques, du laitier, des flammes ouvertes, des étin-celles et des arcs.

� Placer les bouteilles debout en les fixant dans un support stationnai-re ou dans un porte-bouteilles pour les empêcher de tomber ou dese renverser.

� Tenir les bouteilles éloignées des circuits de soudage ou autres cir-cuits électriques.

� Ne jamais placer une torche de soudage sur une bouteille à gaz.� Une électrode de soudage ne doit jamais entrer en contact avec une

bouteille.� Ne jamais souder une bouteille pressurisée – risque d’explosion.� Utiliser seulement des bouteilles de gaz protecteur, régulateurs,

tuyaux et raccords convenables pour cette application spécifique;les maintenir ainsi que les éléments associés en bon état.

� Ne pas tenir la tête en face de la sortie en ouvrant la soupape de labouteille.

� Maintenir le chapeau de protection sur la soupape, sauf en cas d’uti-lisation ou de branchement de la bouteille.

� Lire et suivre les instructions concernant les bouteilles de gaz com-primé, les équipements associés et les publications P-1 CGA énu-mérées dans les normes de sécurité.

Si des BOUTEILLES sont endomma-gées, elles pourront exploser.

OM-360 Page 7

1-3. Dangers supplémentaires en relation avec l’installation, le fonctionnementet la maintenance

Risque D’INCENDIE OUD’EXPLOSION.

� Ne pas placer l’appareil sur, au-dessus ou à proxi-mité de surfaces infllammables.

� Ne pas installer l’appareil à proximité de produits inflammables� Ne pas surcharger l’installation électrique – s”assurer que l’alimen-

tation est correctement dimensionné et protégé avant de mettrel’appareil en service.

LA CHUTE DE L’APPAREIL peutblesser.

� Utiliser l’anneau de levage uniquement pour sou-lever l’appareil, NON PAS les chariot, les bouteil-les de gaz ou tout autre accessoire.

� Utiliser un engin d’une capacité appropriée poursoulever l’appareil.

� En utilisant des fourches de levage pour déplacer l’unité, s’assurerque les fourches sont suffisamment longues pour dépasser du côtéopposé de l’appareil.

L’EMPLOI EXCESSIF peutSURCHAUFFER L’ÉQUIPEMENT.

� Prévoir une période de refroidissement, respec-ter le cycle opératoire nominal.

� Réduire le courant ou le cycle opératoire avant derecommancer le soudage.

� Ne pas obstruer les passages d’air du poste.

LES CHARGES ÉLECTROSTATI-QUES peuvent endommager les cir-cuits imprimés.

� Établir la connexion avec la barrette de terreavant de manipuler des cartes ou des pièces.

� Utiliser des pochettes et des boîtes antistatiquespour stocker, déplacer ou expédier des cartes decircuits imprimes.

DES ORGANES MOBILES peuventprovoquer des blessures.

� Ne pas s’approcher des organes mobiles.� Ne pas s’approcher des points de coincement

tels que des rouleaux de commande.

LES FILS DE SOUDAGE peuvent pro-voquer des blessures.

� Ne pas appuyer sur la gachette avant d’en avoirreçu l’instruction.

� Ne pas diriger le pistolet vers soi, d’autres person-nes ou toute pièce mécanique en engageant le filde soudage.

DES ORGANES MOBILES peuventprovoquer des blessures.

� Rester à l’écart des organes mobiles comme leventilateur.

� Maintenir fermés et fixement en place les portes,panneaux, recouvrements et dispositifs deprotection.

LE RAYONNEMENT HAUTE FRÉ-QUENCE (H.F.) risque de provoquerdes interférences.

� Le rayonnement haute frequence peut provoquerdes interférences avec les équipements de ra-dio–navigation et de communication, les servicesde sécurité et les ordinateurs.

� Demander seulement à des personnes qualifiées familiariséesavec des équipements électroniques de faire fonctionner l’installa-tion.

� L’utilisateur est tenu de faire corriger rapidement par un électricienqualifié les interférences résultant de l’installation.

� Si le FCC signale des interférences, arrêter immédiatement l’appa-reil.

� Effectuer régulièrement le contrôle et l’entretien de l’installation.� Maintenir soigneusement fermés les portes et les panneaux des

sources de haute fréquence, maintenir les éclateurs à une distancecorrecte et utiliser une terre et et un blindage pour réduire les interfé-rences éventuelles.

LE SOUDAGE À L’ARC risque deprovoquer des interférences.

� L’énergie électromagnétique risque de provoquerdes interférences pour l’équipement électroniquesensible tel que les ordinateurs et l’équipementcommandé par ordinateur tel que les robots.

� Veiller à ce que tout l’équipement de la zone de soudage soit com-patible électromagnétiquement.

� Pour réduire la possibilité d’interférence, maintenir les câbles desoudage aussi courts que possible, les grouper, et les poser aussibas que possible (ex. par terre).

� Veiller à souder à une distance de 100 mètres de tout équipementélectronique sensible.

� Veiller à ce que ce poste de soudage soit posé et mis à la terreconformément à ce mode d’emploi.

� En cas d’interférences après avoir pris les mesures précédentes, ilincombe à l’utilisateur de prendre des mesures supplémentaires tel-les que le déplacement du poste, l’utilisation de câbles blindés, l’uti-lisation de filtres de ligne ou la pose de protecteurs dans la zone detravail.

LES CHAMPS MAGNÉTIQUES peuventaffecter les stimulateurs cardiaques.

� Porteurs de stimulateur cardiaque, restez à dis-tance.

� Les porteurs d’un stimulateur cardiaque doiventd’abord consulter leur médecin avant de s’appro-cher des opérations de soudage à l’arc, de gou-geage ou de soudage par points.

OM-360 Page 8

1-4. Principales normes de sécurité

Safety in Welding and Cutting, norme ANSI Z49.1, de l’American Wel-ding Society, 550 N.W. Lejeune Rd, Miami FL 33126

Safety and Health Sandards, OSHA 29 CFR 1910, du Superintendentof Documents, U.S. Government Printing Office, Washington, D.C.20402.

Recommended Safe Practice for the Preparation for Welding and Cut-ting of Containers That Have Held Hazardous Substances, norme AWSF4.1, de l’American Welding Society, 550 N.W. Lejeune Rd, Miami FL33126

National Electrical Code, NFPA Standard 70, de la National Fire Protec-tion Association, Batterymarch Park, Quincy, MA 02269.

Safe Handling of Compressed Gases in Cylinders, CGA Pamphlet P-1,de la Compressed Gas Association, 1235 Jefferson Davis Highway,Suite 501, Arlington, VA 22202.

Règles de sécurité en soudage, coupage et procédés connexes, normeCSA W117.2, de l’Association canadienne de normalisation, vente denormes, 178 Rexdale Boulevard, Rexdale (Ontario) Canada M9W 1R3.

Safe Practices For Occupation And Educational Eye And Face Protec-tion, norme ANSI Z87.1, de l’American National Standards Institute,1430 Broadway, New York, NY 10018.

Cutting and Welding Processes, norme NFPA 51B, de la National FireProtection Association, Batterymarch Park, Quincy, MA 02269.

1-5. Information sur les champs électromagnétiques

Données sur le soudage électrique et sur les effets, pour l’organisme,des champs magnétiques basse fréquence

Le courant de soudage, pendant son passage dans les câbles de sou-dage, causera des champs électromagnétiques. Il y a eu et il y a encoreun certain souci à propos de tels champs. Cependant, après avoir ex-aminé plus de 500 études qui ont été faites pendant une période derecherche de 17 ans, un comité spécial ruban bleu du National Re-search Council a conclu: “L’accumulation de preuves, suivant lejugement du comité, n’a pas démontré que l’exposition aux champsmagnétiques et champs électriques à haute fréquence représente unrisque à la santé humaine”. Toutefois, des études sont toujours en courset les preuves continuent à être examinées. En attendant que les con-clusions finales de la recherche soient établies, il vous seraitsouhaitable de réduire votre exposition aux champs électromagnéti-ques pendant le soudage ou le coupage.

Afin de réduire les champs électromagnétiques dans l’environnementde travail, respecter les consignes suivantes :

1 Garder les câbles ensembles en les torsadant ou en lesattachant avec du ruban adhésif.

2 Mettre tous les câbles du côté opposé de l’opérateur.

3 Ne pas courber pas et ne pas entourer pas les câbles autour devotre corps.

4 Garder le poste de soudage et les câbles le plus loin possible devous.

5 Relier la pince de masse le plus près possible de la zone desoudure.

Consignes relatives aux stimulateurs cardiaques :

Les personnes qui portent un stimulateur cardiaque doivent avant toutconsulter leur docteur. Si vous êtes déclaré apte par votre docteur, il estalors recommandé de respecter les consignes ci–dessus.

OM-360 Page 9

SECTION 2 – INSTALLATION

2-1. Included with Your Unit

1 12 ft (3.7 m) Work CableWith Clamp AndQuick-Connect

2 DB1712RDI 150 Amp TIGTorch with 12 ft (3.7 m)Cable

3 Electrode Holder andQuick-Connect

4 Gas Hose

5 Gas Regulator

6 RFCS-14 Foot Control with20 ft (6 m) Cable

7 8 ft (2.4 m) Primary CordWithout Plug

� Some assembly is required.

For options and accessories seeback of book or contact your dis-tributor.

1

2

3

4

5

7

6

803 253

2-2. Selecting A Location

1 Lifting Eye

2 Lifting Forks

Use lifting eye or lifting forks tomove unit.

If using lifting forks, extend forksbeyond opposite side of unit.

3 Rating Label

Use rating label to determine inputpower needs.

4 Line Disconnect Device

Locate unit near correct input pow-er supply.

Position unit so air can circulate.

For information about sources ofhigh-frequency see Section 6.

For carts and caster kits see backof book or contact your distributor.

� Special installation may berequired where gasoline orvolatile liquids are present –see NEC Article 511 or CECSection 20.

1

2

Movement

4

18 in (460mm)

Location And Airflow

OR

18 in(460 mm)

3

18 in (460mm)

18 in (460mm)

OM-360 Page 10

2-3. Dimensions And Weights

Dimensions

Height 30 in (762 mm)

Width 16 in (406 mm)

Length 22-1/8 in (562 mm)

A A 18 in (457 mm)

B 3/4 in (19 mm)

E C 1 in (25 mm)

B D 15-3/4 (400 mm)

E 4-Holes 1/2 Dia (13 mm)

C Weight

Front803 256

D224 lbs (102 kg)

2-4. Specifications

ModeRated Output at 40%

Duty CycleRated Input,

60 HZ, Single-Phase KVA KWWelding Amperage

RangeMax. Open-Circuit

Voltage

DC TIG 150 Amps at 16 Volts 230 V–45 A - (2)* 10.2 - (0.50)* 4.3 - (0.3)* 10–180 80

DC Stick 150 Amps at 26 Volts 230 V–47 A - (2)* 10.8 - (0.50)* 5.8 - (0.3)* 10–180 80

AC TIG 150 Amps at 16 Volts 230 V–54 A - (2)* 12.3 - (0.50)* 4.5 - (0.3)* 10–180 80

AC Stick 150 Amps at 26 Volts 230 V–54 A - (2)* 12.4 - (0.50)* 6 - (0.3)* 10–180 80

* () While idling.

2-5. Duty Cycle ChartDuty cycle is percentage of 10minutes that unit can weld at ratedload without overheating.

� Exceeding duty cycle candamage unit and voidwarranty.

40% Duty Cycle at 150 A AC/DC

ST-188 276-A

4 Minutes Welding 6 Minutes Resting

OM-360 Page 11

2-6. Volt-Ampere Curves

ssb1.1 10/91 – ST-188 277 / ST-188 278

Volt-ampere curves show minimumand maximum voltage and amper-age output capabilities of weldingpower source. Curves of other set-tings fall between curves shown.

DC V/A CURVE

0

10

20

30

40

50

60

70

80

0 50 100 150 200 250 300 350 400 450

AMPS

VO

LTS

AC V/A Curve

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

0.00 50.00 100.00 150.00 200.00 250.00 300.00

Amps

Volt

s

AC Stick Max(Max DIG)

AC TIG Max (Max Pen)AC TIG Min (Balanced)

AC Stick Min(Max DIG)

AC Stick Min(Min DIG)

DC Stick Min(Max Arc Control)

DC TIG Min

DC Stick Max(Max Arc Control)

DC TIG Max

2-7. Weld Output Terminals And Selecting Cable Sizes

� ARC WELDING can cause Electromagnetic Interference.

To reduce possible interference, keep weld cables as short as possible, close together, and down low, such as on the floor.Locate welding operation 100 meters from any sensitive electronic equipment. Be sure this welding machine is installedand grounded according to this manual. If interference still occurs, the user must take extra measures such as movingthe welding machine, using shielded cables, using line filters, or shielding the work area.

Total Cable (Copper) Length In Weld Circuit Not Exceeding

100 ft (30 m) Or Less 150 ft(45 m)

200 ft(60 m)

250 ft(70 m)

300 ft(90 m)

350 ft(105 m)

400 ft(120 m)

Weld OutputTerminals

� Turn off power beforeconnecting to weld out-put terminals.

� Do not use worn, dam-aged, undersized, orpoorly spliced cables.

WeldingAmperes

10 – 60%DutyCycle

60 – 100%DutyCycle

10 – 100% Duty Cycle

100 4 4 4 3 2 1 1/0 1/0

150 3 3 2 1 1/0 2/0 3/0 3/0

200 3 2 1 1/0 2/0 3/0 4/0 4/0

ElectrodeWork

803 255250 2 1 1/0 2/0 3/0 4/0 2-2/0 2-2/0

Weld cable size (AWG) is based on either a 4 volts or less drop or a current density of at least 300 circular mils per ampere. S-0007-D

OM-360 Page 12

2-8. Remote 14 Receptacle

Socket* Socket Information

A 24 volts DC.

B Contact closure to A completes 24 volts DC contactor controlcircuit.

C Command reference; 0 to +10 volts DC output to remote control.

A JK

D Remote control circuit common.

B K I

C L N HA

E 0 to +10 volts DC input command signal from remote control.

D M GE F

K Chassis common.

*The remaining sockets are not used.

2-9. Shielding Gas Connections

803 255 / Ref. 157 858

� Turn Off power before con-necting to receptacle.

1 Gas Valve In Fitting

Fitting has 5/8-18 right-handthreads.

Located on rear of unit.

2 Gas Valve Out Fitting

Gas connection is integrated intothe Electrode weld output terminalby means of a flow-through typeconnector.

3 Cylinder Valve

Open valve slightly so gas flowblows dirt from valve. Close valve.

4 Regulator/Flow Gauge

Connect regulator/flow gauge togas cylinder.

Connect gas hose to gas in fitting.

5 Flow Adjust

Typical flow rate is 20 cfh (cubic feetper hour).

5

4

5/8, 1-1/8 in

Tools Needed: 3

1

2

OM-360 Page 13

2-10. Typical TIG Connections� Turn off power before mak-

ing connections.

1 Remote Foot Control

A customer supplied remote finger-tip control may also be used.

2 Torch3 Work Clamp

Connect remote control, torch, andwork clamp to receptacles asshown.

4 Cylinder

Chain or secure cylinder to runninggear, wall, or other stationarysupport.

5 Cylinder Valve

Open valve slightly so gas flowblows dirt from valve. Close valve.

6 Regulator/Flow Gauge

Install so face is vertical.

7 Flow Adjust

Typical flow rate is 20 cfh (cubic feetper hour) (9.4 L/min).

NOTE: After activating remote con-trol, 0.2 seconds of gas preflow willbegin.

Application:

Preflow is used to purge the imme-diate weld area of atmosphere.Preflow also aids in consistent arcstarting. Preflow is preset and is notadjustable.

Application:

Postflow is required to cool tung-sten and weld, and to prevent con-tamination of tungsten and weld. In-crease postflow time if tungsten orweld are dark in appearance (seeSection 3-4).

5

6

7

Tools Needed:

5/8, 1-1/8 in

4

1

3

2

OM-360 Page 14

2-11. Typical Stick Connections

� Turn off power before mak-ing connections.

1 Electrode Holder

2 Work Clamp

Connect electrode holder and workclamp to receptacles as shown.

1

2

OM-360 Page 15

2-12. Electrical Service Guide

All values calculated at 40% duty cycle.NOTE60 Hz Single Phase

Input Voltage 230

Input Amperes At Rated Output 54

Max Recommended Standard Fuse or circuit breaker Rating In Amperes 1

Time-Delay 2 60

Normal Operating 3 80

Min Input Conductor Size In AWG/Kcmil 8

Max Recommended Input Conductor Length In Feet (Meters) 147 (45)

Min Grounding Conductor Size In AWG/Kcmil 8

Reference: 1999 National Electrical Code (NEC)

1 Choose a circuit breaker with time current curves comparable to a time-delay fuse.

2 “Time-Delay” fuses are UL class “RK5” .3 “Normal Operating” (general purpose - no intentional delay) fuses are UL class “K5” (up to and including 60 amp), and UL class “H” ( 65 amp and

above).

2-13. Connecting Input Power

Tools Needed: � Disconnect and lockout/tag-out input power before con-necting input conductorsfrom unit.

� Have only qualified personsmake this installation.

� Special installation may berequired where gasoline orvolatile liquids are present –see NEC Article 511 or CECSection 20.

Units come equipped with inputpower cord for installation into linedisconnect device. Select type andsize overcurrent protection usingSection 2-12.

GND/PEConnect green or green/yellow

grounding conductor first.

GND/PE

L1 L2

Install conductors into a deenergizedline disconnect device.

803 254

OM-360 Page 16

SECTION 3 – OPERATION

3-1. Controls

1 Output Selector Switch� Do not use AC output in damp areas, if

movement is confined, or if there isdanger of falling. Use AC output ONLYif required for the welding process, andthen use a remote control.

� Do not change position of switch whilewelding or while under load.

Use switch to select Direct Current ElectrodeNegative (DCEN), AC, or Direct Current Elec-trode Positive (DCEP) output without changingweld output cable connections.2 Amperage Adjust ControlFor Stick (SMAW), use control to adjustamperage (see Section 3-2).For remote amperage control used when TIG(GTAW) welding, front panel Amperage controlsetting is the maximum amperage available atthe remote control device.See Section 3-3 for example of remote amper-age control.

3 Weld Process Button

Press button to select weld process.

In Stick position, weld output goes On and Offwith Power switch.

In GTAW (TIG) position, remote control deviceturns on and adjusts weld output of unit as lim-ited by Amperage control. For Direct CurrentElectrode Negative (DCEN), built-in arc startercomes on when needed to start or stabilizewelding arc. For AC welding, the arc starter willturn on and stay on to start and stabilize thewelding arc. No adjustments needed for arcstarter.

The blue On LED indicates when weld outputis on.

4 Balance/DIG Control

See Section 3-7.

5 Voltmeter

Voltmeter displays average voltage (to thenearest 0.1 V) at the weld output terminals.

6 Ammeter

Use meter to preset amperage. Meter displaysaverage weld amperage output of unit to near-est ampere when welding.

NOTE: Meters are self-calibrating. No adjust-ment available.

7 Power Switch

Use switch to turn unit and fan On and Off.

1

2

3

4

5 6

7

208 414

OM-360 Page 17

3-2. Example of Front Panel Amperage Control For Stick (SMAW) Welding

Select amperage.

Select weld process. Select polarity.

3-3. Example of Remote Amperage Control For TIG (GTAW) Welding

Select max amperageSelect weld process.

Select polarity.

Connect remote control (see Section 2-10).

In Example:For remote amperage control, front panel amperage control setting is themaximum amperage available. Full range is 10–180 amps DC, but if frontpanel amperage control is set at 130 amps, the range of remote amperage

control is 10 to 130 amps DC. NOTE: Remote amperage control is activewhenever a remote control is connected. If the remote device does notinclude a means of controlling amperage through pin E (see Section 2-8),

the Amperage Adjustment control on the front panel remains active.

or

OM-360 Page 18

3-4. Postflow Control

To access postflow control, proceed as fol-lows:1 Output Selector Switch

Place switch in the Electrode Positive posi-tion.2 Weld Process Switch3 Power SwitchPress and hold Weld Process button whileturning on the power. Hold button forapproximately 7 seconds (or until software

version number clears meters).The factory default setting is 12 seconds. Tochange the postflow time (5–18 seconds),press and release the weld process buttonuntil desired time is displayed on the me-ters. Press torch trigger or turn Off power tosave setting.Use Postflow to set length of time gas flowsafter welding stops. It is important to setenough time to allow gas to flow until afterthe tungsten and weld puddle has cooled

down. Postflow time does not change if out-put is changed from DC to AC, or from ACto DC.

Application:

Postflow is required to cool tungsten andweld, and to prevent contamination of tung-sten and weld. Increase postflow time iftungsten or weld are dark in appearance(approximately 1 second per 10 ampere ofwelding current).

1

2

3

OM-360 Page 19

3-5. Selecting TIG Starting Characteristics

1

Use this function to select desired TIG start-ing characteristics.

1 Output Selector Switch2 Weld Process Button3 Power Switch4 Meters

To select or change TIG starting character-istics, proceed as follows: turn Off power.Place Output Selector switch in desiredposition (each position, DCEN or AC hasthree applicable start characteristics op-

tions). Push and hold Weld Process buttonand turn On power. Hold button for approxi-mately 7 seconds (or until software versionnumber clears meters).The meters will display [��] [���] or [��] [�], de-pending on position of Output SelectorswitchPress Weld Process button again to stepthrough the three start characteristicschoices. Amperage (bottom) meter dis-plays active choice �= light start, �=medium/normal start, �=high/hot start.

Press torch trigger or turn Off power to savesetting.

Application:

Select � (light/soft start) – when welding atlow amperages on thin gauge material.

Select � (medium/normal start) – factory de-fault setting used for most welding applica-tions.

Select � (high/hot start) – when welding athigh amperages on thick materials with alarge diameter tungsten.

��

�

2

4

3

OM-360 Page 20

3-6. Timer/Cycle Counter

1 Output Selector Switch

2 Weld Process Switch

3 Power Switch

To read timer/cycle counter, place OutputSelector switch between the AC and

Electrode Negative (–) position. Thenturn power on.

4 Timer Display

The hours and minutes are displayed onthe volt and amp meters for the first five

seconds, and are read as 1, 234 hoursand 56 minutes.5 Cycle DisplayThe cycles are displayed on the volt andamp meters for the next five seconds,and are read as 123, 456 cycles.

2

���

��

���

��

4

5

1

3

OM-360 Page 21

3-7. Balance/DIG Control

1 Balance/DIG Control

Balance Control (AC GTAW):

Control changes the AC outputsquare wave. Rotating the controltowards 10 provides deeper pene-tration. Rotating the control towards0 provides more cleaning action ofthe workpiece.

When the control is in the Balancedposition, the wave shape providesequal penetration and cleaningaction.

Application:

When welding on oxide forming ma-terials such as aluminum or magne-sium, excess cleaning is not neces-sary. To produce a good weld, onlya minimal amount, approximately a0.10 in (2.5mm) of etched zonealong the weld toes is required.

Set control to 7 and adjust as nec-essary. Joint configuration, set-up,process variables, and oxide thick-ness may affect setting.

NOTE: Arc rectification can occurwhen welding at high amperageand/or while welding with heliumgas. If this condition occurs, in-creasing the Balance control to-wards maximum penetration, mayhelp to restabilize the arc.

DIG Control (AC And DC SMAW):

When set at 0, short-circuit amper-age at low arc voltage is the sameas normal welding amperage.

When setting is increased, short-circuit amperage at low arc voltageincreases.

Application:

Control helps arc starting or makingvertical or overhead welds by in-creasing amperage at low arc volt-age, and reduces electrode stickingwhile welding.

Ref. S-0795-A

Balanced

0

10

More Penetration

50% ElectrodePositive

50% ElectrodeNegative

40% ElectrodePositive

60% ElectrodeNegative

Output Waveforms

Balance Control Examples

ArcSetting

1

OM-360 Page 22

SECTION 4 – MAINTENANCE AND TROUBLESHOOTING

4-1. Routine Maintenance

� Disconnect power before maintaining.

� Maintain more often during severe conditions.

3 Months

Replace unreadable labels. Clean and tighten weld terminals.

Repair or replace cracked weldcable.

Repair or replace cracked gashose.

Replace o-ring in Electrode/GasOutput receptacle if cracked.

6 Months

Blow out or vacuum inside.Or

4-2. Adjusting Spark Gaps

� Disconnect and lockout/tagout in-put power before adjusting sparkgaps.

Remove left side panel.

1 Tungsten End Of Point

Replace point if tungsten end disappears;do not clean or dress tungsten.

2 Spark GapNormal spark gap is 0.012 in (0.305 mm).If adjustment is needed, proceed as fol-lows:3 Adjustment ScrewsLoosen screws. Place gauge of properthickness in spark gap.

4 Pressure Point

Apply slight pressure at point until gauge isheld firmly in gap. Tighten screws to 12 in/lbs torque (overtightening will deform plas-tic base). Adjust other gap.

Reinstall left side panel.

Tools Needed:

1

4

3

4

3

2

803 259

OM-360 Page 23

4-3. Voltmeter/Ammeter Help Displays

� All directions are in reference to the frontof the unit. All circuitry referred to is lo-cated inside the unit. There are no userserviceable parts inside unit.

0 Help�Display

Indicates a short in the thermal protection cir-cuitry located on the transformer of the unit.If this display is shown, contact a Factory Au-thorized Service Agent.

1 Help�Display

An SCR overcurrent or undercurrent condi-tion has occurred. Turn power off and backon to correct condition. If problem continues,contact a Factory Authorized Service Agent.

2 Help � Display

Indicates a malfunction in the thermalprotection circuitry located on the transform-er of the unit. If this display is shown, contacta Factory Authorized Service Agent.

3 Help � Display

Indicates the transformer of the unit hasoverheated. The unit has shut down to allowthe fan to cool it (see Section 2-5). Operationwill continue when the unit has cooled.

4 Help � Display

Indicates a malfunction in the thermalprotection circuitry located on the rectifierassembly of the unit. If this display is shown,contact a Factory Authorized Service Agent.

5 Help � Display

Indicates the rectifier assembly of the unithas overheated. The unit has shut down toallow the fan to cool it (see Section 2-5). Op-eration will continue when the unit hascooled.

6 Help Display

Not used.

7 Help � Display

Not used.

8 Help � Display

Not used.

9 Help � Display

Indicates a short in the thermal protection cir-cuitry located on the rectifier assembly of theunit. If this display is shown, contact a Facto-ry Authorized Service Agent.

10 Help �� Display

Indicates Remote Output control is acti-vated. Release Remote Output control toclear help message.

11 Help �� Display

Indicates Output Selector switch is not incorrect position (see Section 3-1).

12 Help �� Display

Indicates a non-allowable set-up on the frontpanel.

13 Help �� Display

Not used.

A

V

A

V3

A

V

���

���

���

���

���

���

A

V

���

���

A

V

���

���

A

V

���

��

A

V

���

���

A

V

���

���

6 8

2

5 7

1 4

A

V

���

���

9

A

V

���

���

10

A

V

���

���

11

A

V

���

���

0

A

V

���

���

12

A

V

���

���

13

OM-360 Page 24

4-4. Troubleshooting

NOTE: The remedies listed below are recommendations only. If these remedies do not fixthe trouble with your unit, have a Factory Authorized Service Agent check unit.There are no user serviceable parts inside unit.

Refer to Section 4-3 for any Help (���) message displayed on voltmeter/ammeter.

Trouble Remedy

No weld output; unit completelyinoperative.

Place machine power switch in On position (see Section 3-1).

Place line disconnect switch in On position (see Section 2-13).

Check and replace line fuse(s), if necessary (see Section 2-13).

Check for proper input power connections (see Section 2-13).

No weld output; unit on. Check, repair, or replace remote control.

Have Factory Authorized Service Agent check unit.

Unit provides only maximum or Make sure Amperage control is in proper position (see Section 3-1).minimum weld output.

Have Factory Authorized Service Agent check unit.

Erratic or improper weld output. Use proper size and type of weld cable (see Section 2-7).

Clean and tighten all weld connections.

Check position of Output Selector control (see Section Figure 3-1).

If using remote control, check position of Amperage Adjustment control (see Section 3-1).

No control of weld output. Make sure Amperage control is in proper position (see Section 3-1).

Lack of high frequency; difficulty instarting GTAW arc.

Select proper size tungsten.

Be sure torch cable is not close to any grounded metal.

Check cables and torch for cracked insulation or bad connections. Repair or replace.

Check spark gaps (see Section 4-2).

Wandering arc – poor control of Reduce gas flow rate.direction of arc.

Select proper size tungsten.

Properly prepare tungsten.

Tungsten electrode oxidizing and not Shield weld zone from drafts.remaining bright after conclusion ofweld. Increase postflow time.

Check and tighten all gas fittings.

Properly prepare tungsten.

Fan not operating. Unit equipped with Fan-On-Demand�. Fans run only when necessary. Unit equipped with circuitry toprotect against overheating.

No weld output; fan does not run. Place line disconnect switch in On position (see Section 2-13).

Check and replace line fuse(s), if necessary, or reset circuit breaker (see Section 2-13).

Check for proper input power connections (see Section 2-13).

No weld output; fan on. Be sure Polarity switch is not set between positions.

Tighten remote control connection to Remote 14 receptacle (see Section 2-8).

Check remote control (see remote control Owner’s Manual).

Unit overheated. Allow unit to cool (see Section 2-5).

Fan not operating; weld output Check for and remove anything blocking fan movement.available.

Have Factory Authorized Service Agent check fan motor.

OM-360 Page 25

SECTION 5 – ELECTRICAL DIAGRAM

Figure 5-1. Circuit Diagram All Models207 214

OM-360 Page 26

SECTION 6 – HIGH FREQUENCY (HF)

6-1. Welding Processes Requiring High Frequency

high_freq 12/96 – S-0693

1 High-Frequency Voltage

TIG – helps arc jump air gapbetween torch and workpiece and/or stabilize the arc.1

TIG

Work

50 ft(15 m)

S-0694

Sources Of Direct HF Radiation

1 HF source (welding power source withbuilt-in HF or separate HF unit)

2 Weld Cables

3 Torch

4 Work Clamp

5 Workpiece

6 Work Table

Sources Of Conduction Of HF

7 Input Power Cable

8 Line Disconnect Device

9 Input Supply Wiring

Sources Of Reradiation Of HF

10 Ungrounded Metal Objects

11 Lighting

12 Wiring

13 Water Pipes And Fixtures

14 External Phone And Power Lines

6-2. Sources Of HF Radiation From Incorrect Installation

Weld Zone

13

9

8

7

1

2

4 5 6

3

10

11, 12

14

OM-360 Page 27

6-3. Correct Installation

1 HF Source (Welder With Built-In HF OrSeparate HF Unit)

Ground metal machine case, work outputterminal, line disconnect device, inputsupply, and worktable.

2 Welding Zone And Centerpoint

A circle 50 ft (15 m) from centerpointbetween HF source and welding torch in alldirections.

3 Weld Output Cables

Keep cables short and close together.

4 Conduit Joint Bonding And Grounding

Electrically join (bond) all conduit sectionsusing copper straps or braided wire. Groundconduit every 50 ft (15 m).

5 Water Pipes And Fixtures

Ground water pipes every 50 ft (15 m).

6 External Power Or Telephone Lines

Locate HF source at least 50 ft (15 m) awayfrom power and phone lines.

7 Grounding Rod

Consult the National Electrical Code forspecifications.

8 Metal Building Panel Bonding Methods

Bolt or weld building panels together, installcopper straps or braided wire across seams,and ground frame.

9 Windows And Doorways

Cover all windows and doorways withgrounded copper screen of not more than1/4 in (6.4 mm) mesh.

10 Overhead Door Track

Ground the track.

Ref. S-0695 / Ref. S-0695

1

2

50 ft(15 m)

Weld Zone

3

6

50 ft(15 m)

7

4

7

5

GroundWorkpieceIf RequiredBy Codes

Ground AllMetal ObjectsAnd All Wiring

In Welding ZoneUsing #12 AWG

Wire

NonmetalBuilding

8

10

9

Metal Building

77

OM-360 Page 28

SECTION 7 – SELECTING AND PREPARING TUNGSTENELECTRODE FOR DC OR AC WELDING

ac/dc_gtaw 2/2000

� Whenever possible and practical, use DC weld output instead of AC weld output.

7-1. Selecting Tungsten Electrode (Wear Clean gloves To Prevent Contamination Of Tungsten)

Amperage Range - Gas Type♦ - Polarity

Electrode Diameter DC – Argon – ElectrodeNegative/Straight Po-

larity

DC – Argon – Elec-trode Positive/Rev-

erse Polarity

AC – Argon AC – Argon –

Balanced Wave

2% Ceria (Orange Band), 1.5% Lan-thanum (Gray Band), Or 2% Thorium

(Red Band) Alloy Tungstens

.010” Up to 25 * Up to 20 Up to 15

.020” 15-40 * 15-35 5-20

.040” 25-85 * 20-80 20-60

1/16” 50-160 10-20 50-150 60-120

3/32” 135-235 15-30 130-250 100-180

1/8” 250-400 25-40 225-360 160-250

5/32” 400-500 40-55 300-450 200-320

3/16” 500-750 55-80 400-500 290-390

1/4” 750-1000 80-125 600-800 340-525

Pure Tungsten(Green Band)

.010” Up to 15 * Up to 15 Up to 10

.020” 5-20 * 5-20 10-20

.040” 15-80 * 10-60 20-30

1/16” 70-150 10-20 50-100 30-80

3/32” 125-225 15-30 100-160 60-130

1/8” 225-360 25-40 150-210 100-180

5/32” 360-450 40-55 200-275 160-240

3/16” 450-720 55-80 250-350 190-300

1/4” 720-950 80-125 325-450 250-400

Zirconium Alloyed Tungsten (BrownBand)

.010” * * Up to 20 Up to 15

.020” * * 15-35 5-20

.040” * * 20-80 20-60

1/16” * * 50-150 60-120

3/32” * * 130-250 100-180

1/8” * * 225-360 160-250

5/32” * * 300-450 200-320

3/16” * * 400-550 290-390

1/4” * * 600-800 340-525

♦ Typical argon shielding gas flow rates are 15 to 35 cfh (cubic feet per hour). *Not Recommended.

Figures listed are a guide and are a composite of recommendations from American Welding Society (AWS) and electrode manufacturers.

OM-360 Page 29

7-2. Preparing Tungsten Electrode For Welding� Grinding the tungsten electrode produces dust and flying sparks which can cause injury and start fires. Use

local exhaust (forced ventilation) at the grinder or wear an approved respirator. Read MSDS for safety infor-mation. Consider using tungsten containing ceria, lanthana, or yttria instead of thoria. Grinding dust fromthoriated electrodes contains low-level radioactive material. Properly dispose of grinder dust in an environ-mentally safe way. Wear proper face, hand, and body protection. Keep flammables away.

A. Preparing Tungsten For DC Electrode Negative (DCEN) Welding Or AC Welding With Inverter Machines

1 Tungsten Electrode

2 Tapered End

Grind end of tungsten on fine grit,hard abrasive wheel before weld-ing. Do not use wheel for other jobsor tungsten can become contami-nated causing lower weld quality.

3

Ideal Tungsten Preparation – Stable Arc

2-1/2 TimesElectrode Diameter

1 2

1 Stable Arc

2 Flat

Diameter of this flat determinesamperage capacity.

3 Grinding Wheel

Grinding wheel should be dedi-cated to grinding tungsten only.

4 Straight Ground

3

1

2

1 Arc Wander

2 Point

3 Grinding Wheel

Grinding wheel should be dedi-cated to grinding tungsten only.

4 Radial Ground

2

1

4

Wrong Tungsten Preparation – Wandering Arc

4

1 Tungsten Electrode

2 Balled End

� Understand and followsafety symbols at start ofSection 8-1 before preparingtungsten.

Ball end of tungsten by applying ACamperage recommended for a giv-en electrode diameter (see Section7-1). Let ball on end of the tungstentake its own shape.

B. Preparing Tungsten For Conventional AC Welding

1

1 – 1-1/2 Times

2

Electrode Diameter

OM-360 Page 30

SECTION 8 – GUIDELINES FOR TIG WELDING (GTAW)

8-1. Positioning The Torch� Weld current can damage

electronic parts in vehicles.Disconnect both batterycables before welding on avehicle. Place work clamp asclose to the weld as possible.

� For additional information, seeyour distributor for a handbookon the Gas Tungsten Arc Weld-ing (GTAW) process.

1 Workpiece

Make sure workpiece is cleanbefore welding.

2 Work Clamp

Place as close to the weld aspossible.

3 Torch

4 Filler Rod (If Applicable)

5 Gas Cup6 Tungsten Electrode

Select and prepare tungstenaccording to Sections 7-1 and 7-2.

Guidelines:

The inside diameter of the gas cupshould be at least three times thetungsten diameter to provide ade-quate shielding gas coverage. (Forexample, if tungsten is 1/16 indiameter, gas cup should be aminimum of 3/16 in diameter.

Tungsten extension is the distancethe tungsten extends out gas cup oftorch.

The tungsten extension should beno greater than the inside diameterof the gas cup.

Arc length is the distance from thetungsten to the workpiece.

1

10–25°

10–15°

6

2

3

4

90°

4

5

3/16 in

1/16 in

65

Bottom View Of Gas Cup

Ref. ST-161 892

OM-360 Page 31

8-2. Torch Movement During Welding

ST-162 002-B

Tungsten Without Filler Rod

Tungsten With Filler Rod

Form pool Tilt torch Move torch to frontof pool. Repeat process.

75°

75°Welding direction

Form pool Tilt torch Add filler metal

Move torch to frontof pool. Repeat process.

Remove rod

Welding direction 15°

OM-360 Page 32

8-3. Positioning Torch Tungsten For Various Weld Joints

ST-162 003 / S-0792

75°

70°

90°

20°

20°

10°15°

75°

20-40°

30°

15°

75°

90°

15°

Butt Weld And Stringer Bead

“T” Joint

Lap Joint

Corner Joint

OM-360 Page 33

SECTION 9 – STICK WELDING (SMAW) GUIDELINES

9-1. Stick Welding Procedure

stick 12/96 – ST-151 593

� Weld current starts whenelectrode touches work-piece.

� Weld current can damageelectronic parts in vehicles.Disconnect both batterycables before welding on avehicle. Place work clamp asclose to the weld as possible.

1 Workpiece

Make sure workpiece is clean be-fore welding.

2 Work Clamp

3 Electrode

A small diameter electrode requiresless current than a large one. Fol-low electrode manufacturer’sinstructions when setting weld am-perage (see Section 9-2).

4 Insulated Electrode Holder

5 Electrode Holder Position

6 Arc Length

Arc length is the distance from theelectrode to the workpiece. A shortarc with correct amperage will givea sharp, crackling sound.

7 Slag

Use a chipping hammer and wirebrush to remove slag. Remove slagand check weld bead before mak-ing another weld pass.

Tools Needed:

1

4

3

5

2

7

6

OM-360 Page 34

9-2. Electrode and Amperage Selection Chart

Ref. S-087 985-A

3/321/8

5/323/167/32

1/41/165/643/32

1/85/323/167/32

1/43/32

1/85/323/167/32

1/43/32

1/85/323/167/32

1/43/32

1/85/323/167/32

1/43/32

1/85/323/163/32

1/85/32

6010&

6011

6013

7014

7018

7024

Ni-Cl

308L

50 100

150

200

250

300

350

400

450

ELE

CT

RO

DE

DC

*

AC

PO

SIT

ION

PE

NE

TR

AT

ION

US

AG

E

MIN. PREP, ROUGHHIGH SPATTER

GENERAL

SMOOTH, EASY,FAST

LOW HYDROGEN,STRONG

SMOOTH, EASY,FASTER

CAST IRON

STAINLESS

DEEP

DEEP

LOW

MED

LOW

LOW

LOW

LOW

ALL

ALL

ALL

ALL

ALL

FLATHORIZFILLET

ALL

ALL

EP

EP

EP,EN

EP,EN

EP

EP,EN

EP

EP

6010

6011

6013

7014

7018

7024

NI-CL

308L

*EP = ELECTRODE POSITIVE (REVERSE POLARITY) EN = ELECTRODE NEGATIVE (STRAIGHT POLARITY)

ELE

CT

RO

DE

AM

PE

RA

GE

RA

NG

E

DIA

ME

TE

R

9-3. Striking an Arc – Scratch Start Technique

S-0049

1 Electrode

2 Workpiece

3 Arc

Drag electrode across workpiecelike striking a match; lift electrodeslightly after touching work. If arcgoes out electrode was lifted tohigh. If electrode sticks to work-piece, use a quick twist to free it.

1

2

3

9-4. Striking an Arc – Tapping Technique

S-0050

1 Electrode

2 Workpiece

3 Arc

Bring electrode straight down toworkpiece; then lift slightly to startarc. If arc goes out, electrode waslifted too high. If electrode sticks toworkpiece, use a quick twist to free it.

1

3

2

OM-360 Page 35

9-5. Positioning Electrode Holder

S-0060

90° 90°

10°-30°

45°

45°

GROOVE WELDS

FILLET WELDS

End View of Work Angle Side View of Electrode Angle

End View of Work Angle Side View of Electrode Angle

10°-30°

9-6. Poor Weld Bead Characteristics

S-0053-A

1 Large Spatter Deposits

2 Rough, Uneven Bead

3 Slight Crater During Welding

4 Bad Overlap

5 Poor Penetration

5

42 3

1

9-7. Good Weld Bead Characteristics

S-0052-B

1 Fine Spatter

2 Uniform Bead

3 Moderate Crater DuringWelding

Weld a new bead or layer for each1/8 in. (3.2 mm) thickness in metalsbeing welded.

4 No Overlap

5 Good Penetration into BaseMetal

1

52 3 4

OM-360 Page 36

9-8. Conditions That Affect Weld Bead Shape

Weld bead shape is affected by electrode angle, arc length, travel speed, andthickness of base metal.

NOTE

S-0061

ELECTRODE ANGLE

ARC LENGTH

TRAVEL SPEED

Slow Normal Fast

10° - 30°

Drag

Too Short Normal Too Long

Spatter

Angle Too Small Angle Too LargeCorrect Angle

9-9. Electrode Movement During Welding

Normally, a single stringer bead is satisfactory for most narrow groove weld joints;however, for wide groove weld joints or bridging across gaps, a weave bead ormultiple stringer beads work better.

NOTE

S-0054-A

1 Stringer Bead – SteadyMovement Along Seam

2 Weave Bead – Side to SideMovement Along Seam

3 Weave Patterns

Use weave patterns to cover a widearea in one pass of the electrode.Do not let weave width exceed2-1/2 times diameter of electrode.

1 2

3

OM-360 Page 37

9-10. Butt Joints

S-0662

1 Tack Welds

Prevent edges of joint from drawingtogether ahead of electrode by tackwelding the materials in position be-fore final weld.

2 Square Groove Weld

Good for materials up to 3/16 in (5mm) thick.

3 Single V-Groove Weld

Good for materials 3/16 – 3/4 in(5-19 mm) thick. Cut bevel with oxy-acetylene or plasma cutting equip-ment. Remove scale from materialafter cutting. A grinder can also beused to prepare bevels.

Create 30 degree angle of bevel onmaterials in V-groove welding.

4 Double V-Groove Weld

Good for materials thicker than 3/16in (5 mm).

30°

2

1

1/16 in(1.6 mm)

3 4

9-11. Lap Joint

S-0063 / S-0064

1 Electrode

2 Single-Layer Fillet Weld

Move electrode in circular motion.

3 Multi-Layer Fillet Weld

Weld a second layer when a heavi-er fillet is needed. Remove slag be-fore making another weld pass.Weld both sides of joint for maxi-mum strength.

30°Or Less

Single-Layer Fillet Weld Multi-Layer Fillet Weld

30°Or Less

1 1

2 3

9-12. Tee Joint

S-0060 / S-0058-A / S-0061

1 Electrode

2 Fillet Weld

Keep arc short and move at definiterate of speed. Hold electrode asshown to provide fusion into thecorner. Square edge of the weldsurface.

For maximum strength weld bothsides of upright section.

3 Multi-Layer Deposits

Weld a second layer when a heavi-er fillet is needed. Use any of theweaving patterns shown in Section9-9. Remove slag before makinganother weld pass.

45°Or Less

1

2

1

3

2

OM-360 Page 38

9-13. Weld Test

S-0057-B

1 Vise

2 Weld Joint

3 Hammer

Strike weld joint in direction shown.A good weld bends over but doesnot break.2 To 3 in

1/4 in

3

2

1

2 To 3 in

3

2

1

(51-76 mm)

(6.4 mm)

(51-76 mm)

9-14. Troubleshooting – Porosity

Porosity – small cavities or holes resulting from gaspockets in weld metal.

Possible Causes Corrective Actions

Arc length too long. Reduce arc length.

Damp electrode. Use dry electrode.

Workpiece dirty. Remove all grease, oil, moisture, rust, paint, coatings, slag, and dirt from work surface beforewelding.

9-15. Troubleshooting – Excessive Spatter

Excessive Spatter – scattering of molten metal particlesthat cool to solid form near weld bead.

Possible Causes Corrective Actions

Amperage too high for electrode. Decrease amperage or select larger electrode.

Arc length too long or voltage too high. Reduce arc length or voltage.

OM-360 Page 39

9-16. Troubleshooting – Incomplete Fusion

Incomplete Fusion – failure of weld metal to fuse completely withbase metal or a preceeding weld bead.

Possible Causes Corrective Actions

Insufficient heat input. Increase amperage. Select larger electrode and increase amperage.

Improper welding technique. Place stringer bead in proper location(s) at joint during welding.

Adjust work angle or widen groove to access bottom during welding.

Momentarily hold arc on groove side walls when using weaving technique.

Keep arc on leading edge of weld puddle.

Workpiece dirty. Remove all grease, oil, moisture, rust, paint, coatings, slag, and dirt from work surface beforewelding.

9-17. Troubleshooting – Lack Of Penetration

Lack Of Penetration – shallow fusion between weld metal andbase metal.

Lack of Penetration Good Penetration

Possible Causes Corrective Actions

Improper joint preparation. Material too thick. Joint preparation and design must provide access to bottom of groove.

Improper weld technique. Keep arc on leading edge of weld puddle.

Insufficient heat input. Increase amperage. Select larger electrode and increase amperage.

Reduce travel speed.

9-18. Troubleshooting – Excessive Penetration

Good Penetration

Excessive Penetration – weld metal melting through base metal andhanging underneath weld.

Excessive Penetration

Possible Causes Corrective Actions

Excessive heat input. Select lower amperage. Use smaller electrode.

Increase and/or maintain steady travel speed.

OM-360 Page 40

9-19. Troubleshooting – Burn-Through

Burn-Through – weld metal melting completely through base metal resultingin holes where no metal remains.

Possible Causes Corrective Actions

Excessive heat input. Select lower amperage. Use smaller electrode.

Increase and/or maintain steady travel speed.

9-20. Troubleshooting – Waviness Of Bead

Waviness Of Bead – weld metal that is not parallel and does not coverjoint formed by base metal.

Possible Causes Corrective Actions

Unsteady hand. Use two hands. Practice technique.

9-21. Troubleshooting – Distortion

Distortion – contraction of weld met-al during welding that forces basemetal to move.

Base metal movesin the direction of

the weld bead.

Possible Causes Corrective Actions

Excessive heat input. Use restraint (clamp) to hold base metal in position.

Make tack welds along joint before starting welding operation.

Select lower amperage for electrode.

Increase travel speed.

Weld in small segments and allow cooling between welds.

OM-360 Page 41

Notes

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OM-360 Page 42

SECTION 10 – PARTS LIST

Figure 10-1. Main Assembly803 252-A

� Hardware is common andnot available unless listed.

76

5

4

3

1

2

9

10

8

11

12

14

1516

17

18

19

20

21

22

1

28

27

2324

29

30

31

32

3534 33

3637

38

26

28 13

25

OM-360 Page 43

DescriptionPartNo.

Dia.Mkgs.

ItemNo.

Figure 10-1. Main Assembly.

Quantity

1 208412 PANEL,SIDE 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 208435 BAFFLE,FAN 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 208874 SUPPORT,LIFT EYE 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 026627 GASKET,LIFTING EYE COVER 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 203990 LABEL,WARNING GENERAL PRECAUTIONARY STATIC 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 +208409 COVER,TOP 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 201019 LABEL,WARNING ELECTRIC SHOCK EXCESS WEIGHT 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 204389 HOLDER,TORCH/CABLE (CONSISTING OF) 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 200922 HOUSING, TORCH CABLE HOLDER 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10 200920 DOOR, TORCH CABLE HOLDER, 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 208892 FAN,AC 230V BRUSHLESS 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 C1 191944 CAPACITOR,POLYP MET FILM .10UF 250VAC 10% 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 R2 189132 RESISTOR ASSY 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 R1 186468 RESISTOR,WW FXD 100 W 50 OHM W/CLIPS 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 +208410 PANEL,REAR 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 604102 CONN,CLAMP CABLE 1.000 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 190442 CORD SET,250V 8GA 3/C 10FT ST JKT 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 185759 LABEL,WARNING ELECTRIC SHOCK & INPUT POWER 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 605227 NUT, 750–14 KNURLED1.68DIA .41H NYL 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 133873 VALVE, 24VDC 2WAY CUSTOM PORT 1/8 ORF W/FRICT 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 209328 HOSE,NPRN BRD NO 1 X .250 ID X 19.500 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 089120 CLAMP,HOSE .375 – .450 CLP DIA SLFTTNG GREEN 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 208294 CONNECTOR,FASTON MALE 4–PRONG 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 207560 INSULATOR, STANDOFF W/STUD 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 C14 206878 CAPACITOR ASSY 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 T1,Z1 211260 TRANSFORMER/STABILIZER ASSEMBLY 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Figure 10-3 RECTIFIER ASSY, 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 194591 LABEL,MILLER 9.776 X 4.126 HORIZONTAL SYNCROWAV 2. . . . . . . . . . . . . . . . . . . . . . . . . . . 29 208436 HF BOX, 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 R8 211261 RESISTOR,WW FXD 100 W 200 OHM W/CLIPS 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 T4 208890 COIL,COUPLING 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 G1 199854 SPARK GAP ASSY, (CONSISTING OF) 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

199855 BASE, 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199856 HOLDER, POINTS 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196455 POINTS, SPARK GAP 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

33 C18 195552 CAPACITOR,POLYP MET FILM 20. UF 250 VAC 10% 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 C3 096761 CAPACITOR,MICA .002UF 10,000V PNLMTG 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 T3 208045 XFMR,HIGH VOLTAGE 115V PRI 3600V SEC 30 MA W/TERM 1. . . . . . . . . . . . . . . . . . . . . 36 +208413 BASE, 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 192828 LABEL,WARNING ELECTRICAL SHOCK ETC 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Figure 10-2 FRONT PANEL, WITH COMPONENTS 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PLG1 202119 CONNECTOR W/SOCKETS 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PLG7 202116 CONNECTOR W/SOCKETS 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PLG8 202117 CONNECTOR W/SOCKETS 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PLG11 202118 CONNECTOR W/SOCKETS 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OM-360 Page 44

DescriptionPartNo.

Dia.Mkgs.

ItemNo.

Figure 10-1. Main Assembly (Continued).

Quantity

207530 ACCESSORY KIT, (CONSISITNG OF) 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209282 RFCS-14, FOOT CONTROL 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DB1712RDI TORCH, TIG 150A 12.5 FT CABLE 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188 860 WORK CABLE, W/CLAMP 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193094 KIT, REGULATOR 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176840 HOLDER, ELECTRODE W/CABLE & DINSE CONNECTOR 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141162 HOUSING PLUG+PINS,(SERVICE KIT) 0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134460 CONN,TW LK INSUL MALE(DINSE TYPE)70 SERIES 0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155552 CONN,TW LK INSUL MALE(DINSE TYPE)W/GAS PASSAGE 0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206502 SERVICE KIT,SPARK GAP ASSY.(GROUND) 0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

+When ordering a component originally displaying a precautionary label, the label should also be ordered.To maintain the factory original performance of your equipment, use only Manufacturer’s SuggestedReplacement Parts. Model and serial number required when ordering parts from your local distributor.

OM-360 Page 45

803 257-A

� Hardware is common andnot available unless listed.

1

23 4

56

7

8

9

10

11

1113

12

15

16

17

12

14 18

Figure 10-2. Panel, Front With Components

Figure 10-2. Panel, Front With Components (Figure 10-1 Item 38)

Description QuantityPartNo.

Dia.Mkgs.

ItemNo.

1 208414 NAMEPLATE, (order by model and serial number) 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 C13 209587 CAPACITOR ASSEMBLY 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 208411 PANEL,FRONT 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 190512 Stand-Off, No 6-32 x .64 lg 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 204446 CIRCUIT CARD ASSY,CONTROL & INTERFACE W/PROGRAM 1. . . . . . . . . . . . . . . . . . . . . . . .

PLG7, 15 131054 CONNECTOR & SOCKETS 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PLG6 115092 CONNECTOR & SOCKETS 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PLG4 115093 CONNECTOR & SOCKETS 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PLG1 130203 CONNECTOR & SOCKETS 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PLG2 131052 CONNECTOR & SOCKETS 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 S1 128755 SWITCH,TGL DPST 40A 600VAC SCR TERM WIDE TGL 1. . . . . . . . . . . . . . . . . . . . . . . . . . 7 C5, 6 111634 CAPACITOR ASSY, 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 S5 207237 SWITCH ASSY,POLARITY W/LEADS & HARDWARE 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 CM1 197220 MODULE,FILTER .1MF 500VDC 8 CKT 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10 201127 HARNESS,ASSY 14 PIN RECPT 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 185703 IRECEPTACLE, TWISTLOCK ASSEMBLY 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 186092 IRECEPTACLE KIT, DIN STYLE 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 175952 PLASTIC,HANDLE SWITCH 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 169136 PIN, HANDLE 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 174991 KNOB,POINTER 1.250 DIA X .250 ID W/SPRING CLIP–.21 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 195778 ACTUATOR, PUSH BUTTON ASSEMBLY 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 183332 KNOB,POINTER .570 DIA X .125 ID W/SPRING CLIP 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 210571 NAMEPLATE, LOWER 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

+When ordering a component originally displaying a precautionary label, the label should also be ordered.To maintain the factory original performance of your equipment, use only Manufacturer’s SuggestedReplacement Parts. Model and serial number required when ordering parts from your local distributor.

OM-360 Page 46

1 � Hardware is common andnot available unless listed.

803 258

2

3

4

5

67

Figure 10-3. Rectifier Assembly

DescriptionPartNo.

Dia.Mkgs.

208 887

ItemNo. Quantity

Figure 10-3. Rectifier Assembly (Figure 10-1 item 27)

1 206984 HEAT SINK,RECTIFIER 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 MOD1,2 208384 THYRISTOR,SCR MODULE 136A 400V DUAL 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 199962 BUS BAR, 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 207190 BUS BAR,RECTIFIER 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 C7,8,9,10 190460 CAPACITOR ASSY, 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 HD1 191941 TRANSDUCER,CURRENT 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 TH2 206327 THERMISTOR,NTC 30K OHM @ 25 DEG C 27IN LEAD 1. . . . . . . . . . . . . . . . . . . . . . . . . .

To maintain the factory original performance of your equipment, use only Manufacturer’s SuggestedReplacement Parts. Model and serial number required when ordering parts from your local distributor.

Warranty Questions?

Call1-800-4-A-MILLERfor your localMiller distributor.

miller_warr 6/02

Your distributor also givesyou ...

ServiceYou always get the fast,reliable response youneed. Most replacementparts can be in yourhands in 24 hours.

SupportNeed fast answers to thetough welding questions?Contact your distributor.The expertise of thedistributor and Miller isthere to help you, everystep of the way.

Effective January 1, 2002(Equipment with a serial number preface of “LC” or newer)This limited warranty supersedes all previous Miller warranties and is exclusive with no other

guarantees or warranties expressed or implied.

LIMITED WARRANTY – Subject to the terms and conditionsbelow, Miller Electric Mfg. Co., Appleton, Wisconsin, warrantsto its original retail purchaser that new Miller equipment soldafter the effective date of this limited warranty is free of defectsin material and workmanship at the time it is shipped by Miller.THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHERWARRANTIES, EXPRESS OR IMPLIED, INCLUDING THEWARRANTIES OF MERCHANTABILITY AND FITNESS.

Within the warranty periods listed below, Miller will repair orreplace any warranted parts or components that fail due tosuch defects in material or workmanship. Miller must benotified in writing within thirty (30) days of such defect orfailure, at which time Miller will provide instructions on thewarranty claim procedures to be followed.

Miller shall honor warranty claims on warranted equipmentlisted below in the event of such a failure within the warrantytime periods. All warranty time periods start on the date thatthe equipment was delivered to the original retail purchaser, orone year after the equipment is sent to a North Americandistributor or eighteen months after the equipment is sent to anInternational distributor.

1. 5 Years Parts — 3 Years Labor

* Original main power rectifiers* Inverters (input and output rectifiers only)

2. 3 Years — Parts and Labor

* Transformer/Rectifier Power Sources* Plasma Arc Cutting Power Sources* Semi-Automatic and Automatic Wire Feeders* Inverter Power Supplies* Intellitig* Engine Driven Welding Generators

(NOTE: Engines are warranted separately bythe engine manufacturer.)

3. 1 Year — Parts and Labor Unless Specified

* DS-2 Wire Feeder* Motor Driven Guns (w/exception of Spoolmate

Spoolguns)* Process Controllers* Positioners and Controllers* Automatic Motion Devices* RFCS Foot Controls* Induction Heating Power Sources* Water Coolant Systems* Flowgauge and Flowmeter Regulators (No Labor)* HF Units* Grids* Maxstar 85, 140* Spot Welders* Load Banks* Racks* Running Gear/Trailers* Plasma Cutting Torches (except APT & SAF

Models)* Field Options

(NOTE: Field options are covered under TrueBlue for the remaining warranty period of theproduct they are installed in, or for a minimum ofone year — whichever is greater.)

4. 6 Months — Batteries

5. 90 Days — Parts

* MIG Guns/TIG Torches* Induction Heating Coils and Blankets

* APT, ZIPCUT & PLAZCUT Model Plasma CuttingTorches

* Remote Controls* Accessory Kits

* Replacement Parts (No labor)* Spoolmate Spoolguns* Canvas Covers

Miller’s True Blue Limited Warranty shall not apply to:

1. Consumable components; such as contact tips,cutting nozzles, contactors, brushes, slip rings,relays or parts that fail due to normal wear.(Exception: brushes, slip rings, and relays arecovered on Bobcat, Trailblazer, and Legend models.)

2. Items furnished by Miller, but manufactured by others,such as engines or trade accessories. These items arecovered by the manufacturer’s warranty, if any.

3. Equipment that has been modified by any party otherthan Miller, or equipment that has been improperlyinstalled, improperly operated or misused based uponindustry standards, or equipment which has not hadreasonable and necessary maintenance, or equipmentwhich has been used for operation outside of thespecifications for the equipment.

MILLER PRODUCTS ARE INTENDED FOR PURCHASEAND USE BY COMMERCIAL/INDUSTRIAL USERS ANDPERSONS TRAINED AND EXPERIENCED IN THE USEAND MAINTENANCE OF WELDING EQUIPMENT.

In the event of a warranty claim covered by this warranty, theexclusive remedies shall be, at Miller’s option: (1) repair; or (2)replacement; or, where authorized in writing by Miller inappropriate cases, (3) the reasonable cost of repair orreplacement at an authorized Miller service station; or (4)payment of or credit for the purchase price (less reasonabledepreciation based upon actual use) upon return of the goodsat customer’s risk and expense. Miller’s option of repair orreplacement will be F.O.B., Factory at Appleton, Wisconsin, orF.O.B. at a Miller authorized service facility as determined byMiller. Therefore no compensation or reimbursement fortransportation costs of any kind will be allowed.

TO THE EXTENT PERMITTED BY LAW, THE REMEDIESPROVIDED HEREIN ARE THE SOLE AND EXCLUSIVEREMEDIES. IN NO EVENT SHALL MILLER BE LIABLE FORDIRECT, INDIRECT, SPECIAL, INCIDENTAL ORCONSEQUENTIAL DAMAGES (INCLUDING LOSS OFPROFIT), WHETHER BASED ON CONTRACT, TORT ORANY OTHER LEGAL THEORY.

ANY EXPRESS WARRANTY NOT PROVIDED HEREINAND ANY IMPLIED WARRANTY, GUARANTY ORREPRESENTATION AS TO PERFORMANCE, AND ANYREMEDY FOR BREACH OF CONTRACT TORT OR ANYOTHER LEGAL THEORY WHICH, BUT FOR THISPROVISION, MIGHT ARISE BY IMPLICATION,OPERATION OF LAW, CUSTOM OF TRADE OR COURSEOF DEALING, INCLUDING ANY IMPLIED WARRANTY OFMERCHANTABILITY OR FITNESS FOR PARTICULARPURPOSE, WITH RESPECT TO ANY AND ALLEQUIPMENT FURNISHED BY MILLER IS EXCLUDED ANDDISCLAIMED BY MILLER.

Some states in the U.S.A. do not allow limitations of how longan implied warranty lasts, or the exclusion of incidental,indirect, special or consequential damages, so the abovelimitation or exclusion may not apply to you. This warrantyprovides specific legal rights, and other rights may beavailable, but may vary from state to state.

In Canada, legislation in some provinces provides for certainadditional warranties or remedies other than as stated herein,and to the extent that they may not be waived, the limitationsand exclusions set out above may not apply. This LimitedWarranty provides specific legal rights, and other rights maybe available, but may vary from province to province.

PRINTED IN USA 2002 Miller Electric Mfg. Co. 5/02

Miller Electric Mfg. Co.An Illinois Tool Works Company1635 West Spencer StreetAppleton, WI 54914 USA

International Headquarters–USAUSA Phone: 920-735-4505 Auto-AttendedUSA & Canada FAX: 920-735-4134International FAX: 920-735-4125

European Headquarters –United KingdomPhone: 44 (0) 1204-593493FAX: 44 (0) 1204-598066

www.MillerWelds.com

Model Name Serial/Style Number

Purchase Date (Date which equipment was delivered to original customer.)

Distributor

Address

City

State Zip

Please complete and retain with your personal records.

Always provide Model Name and Serial/Style Number.

Call 1-800-4-A-Miller or see our website at www.MillerWelds.comto locate a DISTRIBUTOR or SERVICE AGENCY near you.

Welding Supplies and Consumables

Options and Accessories

Personal Safety Equipment

Service and Repair

Replacement Parts

Training (Schools, Videos, Books)

Technical Manuals (Servicing Informationand Parts)

Circuit Diagrams

Welding Process Handbooks

Contact the Delivering Carrier for:

For assistance in filing or settling claims,contact your distributor and/or equipmentmanufacturer’s Transportation Department.

For Service

Owner’s Record

File a claim for loss or damage duringshipment.

Contact your Distributor for: